Perhaps you should try some spelling variations:
hieu soat » hieu suat, hieu luat, kiem soat
hieu hoat » hieu hoa, thien hoat, hieu luat
phan kien » van kien
dung dat » dung va, dung tai
dat phan » data phan, dam phan, sat phan
kien hoa » dien hoa, tien hoa, kien ha
tin » tinh
luan » quan, lan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung luan van ((hieu soat) OR (hieu hoat)) ) or ( trinh dung dat phan kien hoa ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung luan van ((hieu soat) OR (hieu hoat)) ) OR ( trinh dung dat phan kien hoa ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tin dung luan van ((hieu soat) OR (hieu hoat)) ) or ( trinh dung dat phan kien hoa ))*".